Portable speaker



FIG. 1 is a perspective view of a portable speaker showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is a perspective view viewed from another visual angle;

FIG. 9 is a perspective view showing the practical usage thereof; and,

FIG. 10 is the other perspective view showing the practical usage thereof.

The broken lines depict portions of the portable speaker which form no part of the claimed design. 

CLAIM The ornamental design for a “portable speaker,” as shown and described. 